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/* ===================================================

 * bootstrap-markdown.js v2.7.0

 * http://github.com/toopay/bootstrap-markdown

 * ===================================================

 * Copyright 2013-2014 Taufan Aditya

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 * http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 * ========================================================== */

!function ($) {

  "use strict"; // jshint ;_;

  /* MARKDOWN CLASS DEFINITION

   * ========================== */

  var Markdown = function (element, options) {

    // Class Properties

    this.$ns           = 'bootstrap-markdown'

    this.$element      = $(element)

    this.$editable     = {el:null, type:null,attrKeys:[], attrValues:[], content:null}

    this.$options      = $.extend(true, {}, $.fn.markdown.defaults, options, this.$element.data(), this.$element.data('options'))

    this.$oldContent   = null

    this.$isPreview    = false

    this.$isFullscreen = false

    this.$editor       = null

    this.$textarea     = null

    this.$handler      = []

    this.$callback     = []

    this.$nextTab      = []

    this.showEditor()

  }

  Markdown.prototype = {

    constructor: Markdown

  , __alterButtons: function(name,alter) {

      var handler = this.$handler, isAll = (name == 'all'),that = this

      $.each(handler,function(k,v) {

        var halt = true

        if (isAll) {

          halt = false

        } else {

          halt = v.indexOf(name) < 0

        }

        if (halt == false) {

          alter(that.$editor.find('button[data-handler="'+v+'"]'))

        }

      })

    }

  , __buildButtons: function(buttonsArray, container) {

      var i,

          ns = this.$ns,

          handler = this.$handler,

          callback = this.$callback

      for (i=0;i<buttonsArray.length;i++) {

        // Build each group container

        var y, btnGroups = buttonsArray[i]

        for (y=0;y<btnGroups.length;y++) {

          // Build each button group

          var z,

              buttons = btnGroups[y].data,

              btnGroupContainer = $('<div/>', {

                                    'class': 'btn-group'

                                  })

          for (z=0;z<buttons.length;z++) {

            var button = buttons[z],

                buttonContainer, buttonIconContainer,

                buttonHandler = ns+'-'+button.name,

                buttonIcon = this.__getIcon(button.icon),

                btnText = button.btnText ? button.btnText : '',

                btnClass = button.btnClass ? button.btnClass : 'btn',

                tabIndex = button.tabIndex ? button.tabIndex : '-1',

                hotkey = typeof button.hotkey !== 'undefined' ? button.hotkey : '',

                hotkeyCaption = typeof jQuery.hotkeys !== 'undefined' && hotkey !== '' ? ' ('+hotkey+')' : ''

            // Construct the button object

            buttonContainer = $('<button></button>');

            buttonContainer.text(' ' + this.__localize(btnText)).addClass('btn-default btn-sm').addClass(btnClass);

            if(btnClass.match(/btn\-(primary|success|info|warning|danger|link)/)){

                buttonContainer.removeClass('btn-default');

            }

            buttonContainer.attr({

                'type': 'button',

                'title': this.__localize(button.title) + hotkeyCaption,

                'tabindex': tabIndex,

                'data-provider': ns,

                'data-handler': buttonHandler,

                'data-hotkey': hotkey

            });

            if (button.toggle == true){

              buttonContainer.attr('data-toggle', 'button');

            }

            buttonIconContainer = $('<span/>');

            buttonIconContainer.addClass(buttonIcon);

            buttonIconContainer.prependTo(buttonContainer);

            // Attach the button object

            btnGroupContainer.append(buttonContainer);

            // Register handler and callback

            handler.push(buttonHandler);

            callback.push(button.callback);

          }

          // Attach the button group into container dom

          container.append(btnGroupContainer);

        }

      }

      return container;

    }

  , __setListener: function() {

      // Set size and resizable Properties

      var hasRows = typeof this.$textarea.attr('rows') != 'undefined',

          maxRows = this.$textarea.val().split("\n").length > 5 ? this.$textarea.val().split("\n").length : '5',

          rowsVal = hasRows ? this.$textarea.attr('rows') : maxRows

      this.$textarea.attr('rows',rowsVal)

      if (this.$options.resize) {

        this.$textarea.css('resize',this.$options.resize)

      }

      this.$textarea

        .on('focus',    $.proxy(this.focus, this))

        .on('keypress', $.proxy(this.keypress, this))

        .on('keyup',    $.proxy(this.keyup, this))

        .on('change',   $.proxy(this.change, this))

      if (this.eventSupported('keydown')) {

        this.$textarea.on('keydown', $.proxy(this.keydown, this))

      }

      // Re-attach markdown data

      this.$textarea.data('markdown',this)

    }

  , __handle: function(e) {

      var target = $(e.currentTarget),

          handler = this.$handler,

          callback = this.$callback,

          handlerName = target.attr('data-handler'),

          callbackIndex = handler.indexOf(handlerName),

          callbackHandler = callback[callbackIndex]

      // Trigger the focusin

      $(e.currentTarget).focus()

      callbackHandler(this)

      // Trigger onChange for each button handle

      this.change(this);

      // Unless it was the save handler,

      // focusin the textarea

      if (handlerName.indexOf('cmdSave') < 0) {

        this.$textarea.focus()

      }

      e.preventDefault()

    }

  , __localize: function(string) {

      var messages = $.fn.markdown.messages,

          language = this.$options.language

      if (

        typeof messages !== 'undefined' &&

        typeof messages[language] !== 'undefined' &&

        typeof messages[language][string] !== 'undefined'

      ) {

        return messages[language][string];

      }

      return string;

    }

  , __getIcon: function(src) {

    return typeof src == 'object' ? src[this.$options.iconlibrary] : src;

  }

  , setFullscreen: function(mode) {

    var $editor = this.$editor,

        $textarea = this.$textarea

    if (mode === true) {

      $editor.addClass('md-fullscreen-mode')

      $('body').addClass('md-nooverflow')

      this.$options.onFullscreen(this)

    } else {

      $editor.removeClass('md-fullscreen-mode')

      $('body').removeClass('md-nooverflow')

    }

    this.$isFullscreen = mode;

    $textarea.focus()

  }

  , showEditor: function() {

      var instance = this,

          textarea,

          ns = this.$ns,

          container = this.$element,

          originalHeigth = container.css('height'),

          originalWidth = container.css('width'),

          editable = this.$editable,

          handler = this.$handler,

          callback = this.$callback,

          options = this.$options,

          editor = $( '<div/>', {

                      'class': 'md-editor',

                      click: function() {

                        instance.focus()

                      }

                    })

      // Prepare the editor

      if (this.$editor == null) {

        // Create the panel

        var editorHeader = $('<div/>', {

                            'class': 'md-header btn-toolbar'

                            })

        // Merge the main & additional button groups together

        var allBtnGroups = []

        if (options.buttons.length > 0) allBtnGroups = allBtnGroups.concat(options.buttons[0])

        if (options.additionalButtons.length > 0) allBtnGroups = allBtnGroups.concat(options.additionalButtons[0])

        // Reduce and/or reorder the button groups

        if (options.reorderButtonGroups.length > 0) {

          allBtnGroups = allBtnGroups

              .filter(function(btnGroup) {

                return options.reorderButtonGroups.indexOf(btnGroup.name) > -1

              })

              .sort(function(a, b) {

                if (options.reorderButtonGroups.indexOf(a.name) < options.reorderButtonGroups.indexOf(b.name)) return -1

                if (options.reorderButtonGroups.indexOf(a.name) > options.reorderButtonGroups.indexOf(b.name)) return 1

                return 0

              })

        }

        // Build the buttons

        if (allBtnGroups.length > 0) {

          editorHeader = this.__buildButtons([allBtnGroups], editorHeader)

        }

        if (options.fullscreen.enable) {

          editorHeader.append('<div class="md-controls"><a class="md-control md-control-fullscreen" href="#"><span class="'+this.__getIcon(options.fullscreen.icons.fullscreenOn)+'"></span></a></div>').on('click', '.md-control-fullscreen', function(e) {

              e.preventDefault();

              instance.setFullscreen(true)

          })

        }

        editor.append(editorHeader)

        // Wrap the textarea

        if (container.is('textarea')) {

          container.before(editor)

          textarea = container

          textarea.addClass('md-input')

          editor.append(textarea)

        } else {

          var rawContent = (typeof toMarkdown == 'function') ? toMarkdown(container.html()) : container.html(),

              currentContent = $.trim(rawContent)

          // This is some arbitrary content that could be edited

          textarea = $('<textarea/>', {

                       'class': 'md-input',

                       'val' : currentContent

                      })

          editor.append(textarea)

          // Save the editable

          editable.el = container

          editable.type = container.prop('tagName').toLowerCase()

          editable.content = container.html()

          $(container[0].attributes).each(function(){

            editable.attrKeys.push(this.nodeName)

            editable.attrValues.push(this.nodeValue)

          })

          // Set editor to blocked the original container

          container.replaceWith(editor)

        }

        var editorFooter = $('<div/>', {

                           'class': 'md-footer'

                         }),

            createFooter = false,

            footer = ''

        // Create the footer if savable

        if (options.savable) {

          createFooter = true;

          var saveHandler = 'cmdSave'

          // Register handler and callback

          handler.push(saveHandler)

          callback.push(options.onSave)

          editorFooter.append('<button class="btn btn-success" data-provider="'

                              +ns

                              +'" data-handler="'

                              +saveHandler

                              +'"><i class="icon icon-white icon-ok"></i> '

                              +this.__localize('Save')

                              +'</button>')

        }

        footer = typeof options.footer === 'function' ? options.footer(this) : options.footer

        if ($.trim(footer) !== '') {

          createFooter = true;

          editorFooter.append(footer);

        }

        if (createFooter) editor.append(editorFooter)

        // Set width

        if (options.width && options.width !== 'inherit') {

          if (jQuery.isNumeric(options.width)) {

            editor.css('display', 'table')

            textarea.css('width', options.width + 'px')

          } else {

            editor.addClass(options.width)

          }

        }

        // Set height

        if (options.height && options.height !== 'inherit') {

          if (jQuery.isNumeric(options.height)) {

            var height = options.height

            if (editorHeader) height = Math.max(0, height - editorHeader.outerHeight())

            if (editorFooter) height = Math.max(0, height - editorFooter.outerHeight())

            textarea.css('height', height + 'px')

          } else {

            editor.addClass(options.height)

          }

        }

        // Reference

        this.$editor     = editor

        this.$textarea   = textarea

        this.$editable   = editable

        this.$oldContent = this.getContent()

        this.__setListener()

        // Set editor attributes, data short-hand API and listener

        this.$editor.attr('id',(new Date).getTime())

        this.$editor.on('click', '[data-provider="bootstrap-markdown"]', $.proxy(this.__handle, this))

        if (this.$element.is(':disabled') || this.$element.is('[readonly]')) {

          this.$editor.addClass('md-editor-disabled');

          this.disableButtons('all');

        }

        if (this.eventSupported('keydown') && typeof jQuery.hotkeys === 'object') {

          editorHeader.find('[data-provider="bootstrap-markdown"]').each(function() {

            var $button = $(this),

              hotkey = $button.attr('data-hotkey')

            if (hotkey.toLowerCase() !== '') {

              textarea.bind('keydown', hotkey, function() {

                $button.trigger('click')

                return false;

              })

            }

          })

        }

        if (options.initialstate === 'preview') {

          this.showPreview();

        } else if (options.initialstate === 'fullscreen' && options.fullscreen.enable) {

          this.setFullscreen(true)

        }

      } else {

        this.$editor.show()

      }

      if (options.autofocus) {

        this.$textarea.focus()

        this.$editor.addClass('active')

      }

      if (options.fullscreen.enable && options.fullscreen !== false) {

        this.$editor.append('\

          <div class="md-fullscreen-controls">\

            <a href="#" class="exit-fullscreen" title="Exit fullscreen"><span class="'+this.__getIcon(options.fullscreen.icons.fullscreenOff)+'"></span></a>\

          </div>')

        this.$editor.on('click', '.exit-fullscreen', function(e) {

          e.preventDefault()

          instance.setFullscreen(false)

        })

      }

      // hide hidden buttons from options

      this.hideButtons(options.hiddenButtons)

      // disable disabled buttons from options

      this.disableButtons(options.disabledButtons)

      // Trigger the onShow hook

      options.onShow(this)

      return this

    }

  , parseContent: function() {

      var content,

        callbackContent = this.$options.onPreview(this) // Try to get the content from callback

      if (typeof callbackContent == 'string') {

        // Set the content based by callback content

        content = callbackContent

      } else {

        // Set the content

        var val = this.$textarea.val();

        if(typeof markdown == 'object') {

          content = markdown.toHTML(val);

        }else if(typeof marked == 'function') {

          content = marked(val);

        } else {

          content = val;

        }

      }

      return content;

    }

  , showPreview: function() {

      var options = this.$options,

          container = this.$textarea,

          afterContainer = container.next(),

          replacementContainer = $('<div/>',{'class':'md-preview','data-provider':'markdown-preview'}),

          content

      // Give flag that tell the editor enter preview mode

      this.$isPreview = true

      // Disable all buttons

      this.disableButtons('all').enableButtons('cmdPreview')

      content = this.parseContent()

      // Build preview element

      replacementContainer.html(content)

      if (afterContainer && afterContainer.attr('class') == 'md-footer') {

        // If there is footer element, insert the preview container before it

        replacementContainer.insertBefore(afterContainer)

      } else {

        // Otherwise, just append it after textarea

        container.parent().append(replacementContainer)

      }

      // Set the preview element dimensions

      replacementContainer.css({

        width: container.outerWidth() + 'px',

        height: container.outerHeight() + 'px'

      })

      if (this.$options.resize) {

        replacementContainer.css('resize',this.$options.resize)

      }

      // Hide the last-active textarea

      container.hide()

      // Attach the editor instances

      replacementContainer.data('markdown',this)

      if (this.$element.is(':disabled') || this.$element.is('[readonly]')) {

        this.$editor.addClass('md-editor-disabled');

        this.disableButtons('all');

      }

      return this

    }

  , hidePreview: function() {

      // Give flag that tell the editor quit preview mode

      this.$isPreview = false

      // Obtain the preview container

      var container = this.$editor.find('div[data-provider="markdown-preview"]')

      // Remove the preview container

      container.remove()

      // Enable all buttons

      this.enableButtons('all')

      // Disable configured disabled buttons

      this.disableButtons(this.$options.disabledButtons)

      // Back to the editor

      this.$textarea.show()

      this.__setListener()

      return this

    }

  , isDirty: function() {

      return this.$oldContent != this.getContent()

    }

  , getContent: function() {

      return this.$textarea.val()

    }

  , setContent: function(content) {

      this.$textarea.val(content)

      return this

    }

  , findSelection: function(chunk) {

    var content = this.getContent(), startChunkPosition

    if (startChunkPosition = content.indexOf(chunk), startChunkPosition >= 0 && chunk.length > 0) {

      var oldSelection = this.getSelection(), selection

      this.setSelection(startChunkPosition,startChunkPosition+chunk.length)

      selection = this.getSelection()

      this.setSelection(oldSelection.start,oldSelection.end)

      return selection

    } else {

      return null

    }

  }

  , getSelection: function() {

      var e = this.$textarea[0]

      return (

          ('selectionStart' in e && function() {

              var l = e.selectionEnd - e.selectionStart

              return { start: e.selectionStart, end: e.selectionEnd, length: l, text: e.value.substr(e.selectionStart, l) }

          }) ||

          /* browser not supported */

          function() {

            return null

          }

      )()

    }

  , setSelection: function(start,end) {

      var e = this.$textarea[0]

      return (

          ('selectionStart' in e && function() {

              e.selectionStart = start

              e.selectionEnd = end

              return

          }) ||

          /* browser not supported */

          function() {

            return null

          }

      )()

    }

  , replaceSelection: function(text) {

      var e = this.$textarea[0]

      return (

          ('selectionStart' in e && function() {

              e.value = e.value.substr(0, e.selectionStart) + text + e.value.substr(e.selectionEnd, e.value.length)

              // Set cursor to the last replacement end

              e.selectionStart = e.value.length

              return this

          }) ||

          /* browser not supported */

          function() {

              e.value += text

              return jQuery(e)

          }

      )()

    }

  , getNextTab: function() {

      // Shift the nextTab

      if (this.$nextTab.length == 0) {

        return null

      } else {

        var nextTab, tab = this.$nextTab.shift()

        if (typeof tab == 'function') {

          nextTab = tab()

        } else if (typeof tab == 'object' && tab.length > 0) {

          nextTab = tab

        }

        return nextTab

      }

    }

  , setNextTab: function(start,end) {

      // Push new selection into nextTab collections

      if (typeof start == 'string') {

        var that = this

        this.$nextTab.push(function(){

          return that.findSelection(start)

        })

      } else if (typeof start == 'number' && typeof end == 'number') {

        var oldSelection = this.getSelection()

        this.setSelection(start,end)

        this.$nextTab.push(this.getSelection())

        this.setSelection(oldSelection.start,oldSelection.end)

      }

      return

    }

  , __parseButtonNameParam: function(nameParam) {

      var buttons = []

      if (typeof nameParam == 'string') {

        buttons.push(nameParam)

      } else {

        buttons = nameParam

      }

      return buttons

    }

  , enableButtons: function(name) {

      var buttons = this.__parseButtonNameParam(name),

        that = this

      $.each(buttons, function(i, v) {

        that.__alterButtons(buttons[i], function (el) {

          el.removeAttr('disabled')

        });

      })

      return this;

    }

  , disableButtons: function(name) {

      var buttons = this.__parseButtonNameParam(name),

        that = this

      $.each(buttons, function(i, v) {

        that.__alterButtons(buttons[i], function (el) {

          el.attr('disabled','disabled')

        });

      })

      return this;

    }

  , hideButtons: function(name) {

      var buttons = this.__parseButtonNameParam(name),

        that = this

      $.each(buttons, function(i, v) {

        that.__alterButtons(buttons[i], function (el) {

          el.addClass('hidden');

        });

      })

      return this;

    }

  , showButtons: function(name) {

      var buttons = this.__parseButtonNameParam(name),

        that = this

      $.each(buttons, function(i, v) {

        that.__alterButtons(buttons[i], function (el) {

          el.removeClass('hidden');

        });

      })

      return this;

    }

  , eventSupported: function(eventName) {

      var isSupported = eventName in this.$element

      if (!isSupported) {

        this.$element.setAttribute(eventName, 'return;')

        isSupported = typeof this.$element[eventName] === 'function'

      }

      return isSupported

    }

  , keyup: function (e) {

      var blocked = false

      switch(e.keyCode) {

        case 40: // down arrow

        case 38: // up arrow

        case 16: // shift

        case 17: // ctrl

        case 18: // alt

          break

        case 9: // tab

          var nextTab

          if (nextTab = this.getNextTab(),nextTab != null) {

            // Get the nextTab if exists

            var that = this

            setTimeout(function(){

              that.setSelection(nextTab.start,nextTab.end)

            },500)

            blocked = true

          } else {

            // The next tab memory contains nothing...

            // check the cursor position to determine tab action

            var cursor = this.getSelection()

            if (cursor.start == cursor.end && cursor.end == this.getContent().length) {

              // The cursor already reach the end of the content

              blocked = false